Ventilated buffing wheel



Oct. 17, 1950 v, L RlCHARDs 2,526,420

VENTILATED BUFFING WHEEL Filed Nov. 30, 1948 Patented Oct. 17, i950 11 I:i-UANITEDSTATES PATENT OFFICE` i i 2,526,420 vEN'rILArED BUFFING WHEELVictorLloyd Richards, Toronto, Ontario, Canada, l y assig'nor itoCanadian Hanson and Van ,Winkle lCompany, Limited, Toronto, Ontario,Canada,V

a corporation of Canada `Application vNovember 30, 1948, Serial No.62,739 In Canada October 5, 1948 a claims. (0151+193) This invention.relates to j particularto ventilated buing wheels.L

In the use of hurling wheels yfor finishing and /or polishing articlesthe bufng wheel is rotated at a Very high speed and the workforcedagai'nst it by the operator with such pressure as may be requiredto produce the desired result. A suitable abradant or polishing materialusually intermingled with a suitable carrying vehicle, such as alubricant, is generally applied to the periph- Vention will be obviousfrom the following deery of the wheel. The friction produced by thescription of the invention. contact of the rapidly rotating peripheryVOf the These objects are `accomplished by providing wheel with the workproduces very considerable a hub o-r spacer more or less in the shape ofva heat which in some instances is suiiicient to char flanged Whee1,being formed of a, disc havngslots the bres of the bung material at theperiphg 15 cut into its periphery and having attached at ery of thewheel. the periphery on one side a flanged vring with a I-Ieretoforeattempts have been made to proplain annular ring on the other side sothat the vide means for cooling buffing wheels by circula slots areformed between said rings into radially tion of air between the sectionsof the buing extending air passages said hub being adaptwheels bymounting the buing wheel sections able for use with various types ofbuffs but in upon a hollow Shaft having a Dort or ports leadparticularwith a bun possessing radiating furing to the spaces between thesections of the rows which are formed by folding a plurality of bunngwheel, as disclosed in the patent to Zucker plies 0f flexible materialcut on the bias over a U. S. Patent No. 1,573,961, but in suchconstrucring and stitching in order to hold the ring in tions thesections of the buiiing Wheel are s0 25 place and in order to gather theplies into the closely clamped together between collars upon radiatingfun-OWS, the shaft that a sufficiently rapid circulation of A particularembodiment of this invention may air is not obtained to aCCOInplsh thedesired be described with reference to the drawings in result. which Y,v Y v l The cooling of the wheel has also been accom- Figure 1 is afront elevation of the hub or plished by means disclosed in the patentsto spacer; Myers and Murray U. S. Patent No. 1,922,108; Figure 2 is asectional View of the hub along now Reissue 19,894, and U. S. Patent No.line 2-.2 of Figure 1; Y 2,140,208 in which the bufflng Wheel comprisesa Figure 3 is a front elevation of the preferred series of annularbuiiing units whichare gathered puckered hurling unit; at their inner1edges to produce radially eXtend- Figure 4 is a sectional View of thebuling Wheel ing folds or ridges, the inner circumference of assembly,*y the annular bllfling strips being held by a Ting- As is shown inFigures 1 and 2 the hub or shaped metal binding strip haVing toothededges spacer is made of three parts, a centre plate or bent inwardlytoward each other so as to clamp disc I, a flanged ring 2 and a plainannular ring the layers 0f Cloth together, the rings being also 3appropriately fastened together, for instance, provided with lugs orprojections which in the by spot welding. The @entre plate l is providedassembled Wheel separates the units lomeah with a flanged centralaperture 4 for receiving other, In U. S. Patent No.V 2,140,208 a hub o1a spindle. In addition it is provided with a pluspacer which is designedto aooomloany Suona rality of perforations 5, radially and uniformlybufng element is described. It is provided With f disposed with respectto the central aperture 4, both radially and axially extending airpassages. In the periphery of the central plate are cut a The paltiolllaCOIIS'IYUCOH described in the plurality of rectangular shaped slots 6which are last two mentioned patents has Several dsadequidistantlyspaced from each other about the Vantages. For install-oe the spacer OI'hub is de- 50 periphery. These form passages for delivering Signed foruse With the oney paltioulal buff 01" air outwardly from the centralportion during at least a buff edged with steel. Thus, other therevolutions of the wheel. y types of buffs cannot be used to advantageWith Figure 3 shows the preferred buing unit which this hub. Inaddition, the annular Clamping is formed of a plurality of plies 'I ofcotton cuton rings of the bufng unit which normally acom- Vthe bias anddoubled around the solid steel ring panies the above hub are likely tobe broken 8 and gathered by stitching 9 in order to hold the when theWheel is run at high speeds and `when plies in place and in order toform a radiating so broken will be projected outwardly with great foldsl0. -The folds Ill together with the yslots 6 force thereby endangeringthe operator. in the hub forni the complete Ventilating An object of thepresent invention is to propassages.

vide an improved ventilated builng wheel as sembly which will permit asufficiently free circulation to properly coolthe bufng wheels "Anotherobject of thispinventionis to provide a spacer or hub whichY in additionto providing a flow of air from the central portion of the wheel isadaptable for use with various types'of buffs. Still another object ofthis invention is to provide a bufling Wheel which is of such aconstruction that it does not y apart when the Wheel is run at highspeeds. Other objects of this vin.-

Figure 4, which shows a sectional view of a puffing wheel assembly,illustrates how the basing 3 wheel fits over the flange of thehub orspacer. As in the other gures 1 indicates the central plate, 2 theflanged ring, 3 the plain ring, f6

the slot, 1 the plies of cloth, 8 the ring as stiffening member in thebulng wheel. 'The lathe flanges are indicated iby II and apertures l2 inthese flanges are designed to' permit the 'entranceof air into thecentral portion of the assembly. Under operating conditions air is drawninto the centre of the assembly through the ai-r passages formed by theperforations 5 and forced `out through slots S and furrows I0 to theperiphery by the centrifugal force of the spinning burling wheelassembly.

Although the bufng unit which :is Vpreferred-is as described above othertypes of buis, may lbe used With the hub or spacer which forms part ofthe invention. Thus and furrowed buling unit described in U. S. Reissue19,894 would serve. Evenbuffs possessing no furrows might be iemployedsince radial furrows while advantageous are not essential in aventilated buing wheel. Such unfurrowed buirs might `be those made ofplies stamped from sheeting and either held loosely in the builingassembly or sewn spirally,

crosswise, or radially prior -to using. Buffs might also be made ofsmall pieces of remnant cotton, sewn together into what is known in thetrade as .pieced buffs.

In the preferred buing-unit the plies are made of a strip of cottonwhich has been cut on the bias. In `this way every thread in the`material forms an angle of 45 with the tangent at'the point where thethread reaches the periphery. A buing unit so constructed1 wears muchlonger than one made of plies which have merely been stamped fromsheeting.

Moreover it can Vreadily be seen thatY the 4use of a solid ring in thisbufng unit avoids'the danger of flying apart during operation.-

The preferred iiexible material 4out'of which buffs are made is cotton,however, other textile materials and such materials as paper textilelinters bonded with-a suitable adhesive are known to make satisfactorybufling units.

The material out of which the hub may tbe made is preferably steelbecause 'of -its cheapness and the ease with which the part of hubcan-be made from it. However, any suitable metal, wood, cardboard orcomposite board Vmight -be employed.

In addition the slots 'cut Yin the vperiphery of the centre plate ordisc need notbe rectangular in shape nor uniformly distributed aboutthe'periphery. They may for -instance be 'V-shaped or semi-circular andbe distributed about the 'peripheryas desired.

The advantages which this inventionhas 'over those of the prior art areseveral. For example, the hub or spacer need not Ibe used with thebuiiing unit described above but may be used to mount other types ofbuffs. Moreover, it is not necessary for such lbuis to be edged withsteel since `with this hub the radial air` passages are formed as anintegral part of the hub instead-lof relying on the steel edging to formftwo-'sides'of these air passages. Furthermore, the bufling wheelassembly formed by the above described hub and the preferred Vbuiilngunit is Amuch stronger and hence much safer than other ,prior artbufilng wheel assemblies.

It will be readily understood that many modicationsof ther abovedescribed embodiment of my invention may be made without departing fromthe spirit of the invention and hence fall 4 within Vthe meaning andscope of -the following claims.

Having thus described my invention what I claim is:

1. A 'ventilated buiiing wheel assembly comprising la plurality ofannular bufng sections of flexible material arranged side by side; aspacing and `supporting hub for each of said sections comprising a dischaving a central aperture to receive a spindle and a plurality ofperforations radially disposed with respect to said aperture to formaxially extending air passages and a plurality of spaced slots cut intothe outer periphery `of said disc and extending inwardly, and ringsattached between the spaced slots to opposite sides of ysaid discadjacent the outer periphery, one of said rings having an axiallyextending flange centering and supporting said annular buiing Lsection',the other ring being flat, the depth of eachY ring from the outer edgeto the innerl edge thereof extending inwardly a smaller distanceradially of said disc than said spaced slots and thus dening with saidspaced slots radial air passages; and means clamping said sections andhubs for 'rotation with a spindle as a unit, said means havingperforations therethrough to permit ingress of air.

2. In a ventilated builng Wheel assemsblyyan annular bulng section ofexible material anda supporting hub for said section comprising a dischaving having a central aperture to receive a spindle and a plurality ofperforations radially disposed with respect to said aperture .to formaxially extending air passages and a plurality of spaced slots cut intothe outer periphery of Vsaid disc and extending inwardly, and ringsattached between the spaced slots to opposite sides of said discadjacent the outer periphery, one of said rings having an axiallyextending ange centering and supporting said annular buiTing section,the other ring being flat, the depthof each ring from the outer edge tothe inner edge thereof extending inwardly a smaller distance radially ofsaid disc than said spaced slots and thus defining vwith said spacedslots radial air passages.

y3. Aventilated bufng hub comprising a disc having a central aperture toreceive a spindle and a plurality of perforations radially disposed withrespect to said aperture to form axially extending air passages andajplurality of spaced slots cut into the outer periphery `oi said discand extending inwardly, and rings attached .between the spaced slots toopposite sides of said disc adjacent the outer periphery, one of saidrings having an axially extending flange for centering and supporting anannular bung section of exible material, the other ring being flat, thedepth of each ring from the outer edge to the inner vedge thereofextending inwardly a smaller distance radially 4of said disc than saidspaced slots and thusdening with said spaced slots radial air passages.Y

VICTOR LLOYD RICHARDS.

REFERENCES CITED AThe lfollowing references are of recordinthe le ofthis patent:

UNITED STATES PATENTS Number Name Date 2,102,867 Whitel Dec. 21,19372,124,114 LHommedieu July 19, 1938 2,136,747 Levoy lNov. 15, -19382,140,208 Murray Dec. 13, 1938 2,226,625 MacFarland et al. Dec. 31, 19402,480,409 Glancy Aug. 30, 1949

